Lehmann-Dronke, B. and Pobylitsa, P. V. and Polyakov, M. V. and Schafer, Andreas and Goeke, K. (2000) Hard exclusive electroproduction of two pions. PHYSICS LETTERS B, 475 (1-2). pp. 147-156. ISSN 0370-2693
Full text not available from this repository.Abstract
We have calculated the leading order amplitude of hard exclusive production of two pions in lepton nucleon scattering. At leading twist a pion pair can be produced only in an isospin one or zero state. We have shown that isoscalar states are produced predominantly for x(Bj) > 0.3 and with an invariant mass of the two pions close to the threshold (S-wave) and in the f(2) resonance region (D-wave). These isoscalar pion pairs are mostly produced by two collinear gluons. Hence, comparing the production of charged and neutral pion pairs as a function of x(Bj) and m(pi pi), one can get information about the gluonic component of two-pion distribution amplitudes. (C) 2000 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIRTUAL COMPTON-SCATTERING; NONFORWARD PARTON DISTRIBUTIONS; WAVE-FUNCTIONS; FORM-FACTOR; EVOLUTION; QCD; NUCLEON; MESONS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 May 2022 08:55 |
| Last Modified: | 31 May 2022 08:55 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42818 |
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